The "immaculate conception" of fish in ponds and streams comes primarily from bird poop. They eat the eggs and poop out what doesn't get destroyed. Birds have a rather poor digestive system.

Those deer observed swimming Lake Erie are actually "Illegal Deer Aliens/Immigrants" and are the 1st wave of the "Canadian Invasion Hoarde"! That's why the USCG breaks the ice every winter, It's a "Homeland Defensive Measure"! Remember, the USCG is not just the professionl war-fighting core that the US Navy clings to in time of war!